This method will help you disable or cancle Windows Aero function on Windows VistaÂ
To cancel Windows Aero function or Transparent Windows Vista in order to recall basic appearance :-
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Click ‘Start’ and go to ‘Control Panel’
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Click ‘Appearance and Personalization’
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Go to ‘Personalization’ and then click ‘Change the color scheme’ to change Windows Vista appearance.
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When dialog box pop-up, click ‘Windows Vista Basic’ or if you would like to change to Windows 2000 style, please choose ‘Windows Standard’ instead. Then click OK.
Then your Windows Vista will change to basis appearance.